Mix automation

Definition

Automation records or draws changes in parameters over time: volume, pan, sends, plugins. It turns a static mix into one that follows the music: the vocal that always stays intelligible, the chorus that opens up, the delay tail that arrives only on the last word.

What to automate (most important first)

1. Vocal volume (vocal rides): corrections of ±1–4 dB word by word or phrase by phrase after compression. This is the technique that separates an amateur mix from a professional one.
2. Section volumes: verse −1/−2 dB for the instruments, full chorus; gradual entrance of pads and backing vocals.
3. Sends: delay and reverb throws on single words or snare hits.
4. Filters: HP/LP on the music bus in builds, “radio” effect in intros.
5. Pan: FX movements, auto-panning of percussion.
6. Plugin parameters: saturation drive in the chorus, stereo width, reverb mix, synth cutoff.
7. Mute: removing elements to create space (and in arrangement, for contrast).

Pre- and post-compression

• Volume automation before the compressor (clip gain, or a gain plugin at the start of the chain): the compressor works more evenly.
• Automation after (the fader): final level control in the mix.

Many engineers do both: clip gain for big differences, fader for nuances.

Techniques

• Throw: a send to a delay (dotted 1/4 or 1/8, filtered) raised only on the last word of the phrase. The tail fills the pause without dirtying the rest.
• Bass ride: notes that are too loud or too soft (depending on the register) leveled by hand.
• Wider chorus: automation of a widener on the pad/guitar bus (+10/20%) and of the backing vocal volume.
• Build: HP on the music bus from 20 to 300–600 Hz, growing reverb, last beat in silence.
• Manual de-essing: lowering individual “s” sounds by 3–6 dB (clip gain) when the de-esser is not enough.
• “Breathing” automation: lowering the music by 1 dB when the vocal comes in and raising it again in the pauses (also with sidechain).

In FL Studio

• Automation clip: right-click a parameter → Create automation clip; draw the points in the Playlist and choose the curves (single, double, hold, “stairs”).
• Recording automation: arm recording with the “Automation” options and move a controller (or the mouse); recorded events can be converted into clips.
• Event editor: fine editing of recorded events.
• Fruity Balance or Fruity Send at the start of the chain for pre-compressor gain automation; clip gain on audio clips (clip properties).
• Patcher and macros to automate several parameters with a single control.
• Note: insert fader automation and gain plugin automation add up; set a rule (e.g. fader = mix, plugin = corrections).

Example in A minor

Pop track at 100 BPM:

• Verse: vocal with a +2 dB ride on the final words of phrases that fall in the low register (A3–C4), −1.5 dB on the high notes of the pre-chorus (E5).
• Pre-chorus: music bus HP from 20 to 180 Hz over the last 2 bars, vocal reverb +3 dB.
• Last word of the pre-chorus: dotted 1/4 delay throw.
• Chorus: music +1 dB, backing vocals +4 dB with a one-bar fade-in, drum bus saturation +2 dB of drive.
• Bridge: pad with LP from 8 kHz to 2 kHz to “push it away”.

Common mistakes

• Too many, too small automations done before the balance: you lose control. Static first, then automation.
• Fader automation that contradicts the compression (pumping).
• Forgetting to automate the sends too when you raise the fader a lot: the dry/wet ratio changes.

Exercise

1. Do the vocal rides for an entire verse while listening at low volume: the goal is every word intelligible without raising the vocal overall.
2. Create three delay throws at different points in the song and evaluate which one helps the transition most.

Related topics

“Static balance”, “Mixing the vocal in context”, “Fills and transitions”, “Modulation matrix and macros”, “Space in the mix: reverb and delay”.